Why would she have to resign? Cameron felt obliged to resign for several reasons. I believe the main ones were: a) He had nailed his public colours too firmly to the EU mast, even after being humiliated in the pre-negotiation. b) He was strongly associated with Project Fear. c) He was negligent in making fcuk all contingency plan for a "no" vote. d) He's first and foremost a PR man, not a manager or implementer. Picking up the reins after that would have been both untenable and unpalatable. May needs to stick to her guns re no Scottish referendum until after Brexit. She can then cross the Indyref2 bridge when she comes to it. Who knows what the backdrop will be at that point? There is no guarantee Scots will vote for independence if there's a real prospect of being outside both the Union and EU.